package org.example.service.impl;

import com.baomidou.mybatisplus.core.conditions.query.LambdaQueryWrapper;
import com.baomidou.mybatisplus.core.toolkit.IdWorker;
import com.baomidou.mybatisplus.extension.plugins.pagination.Page;
import com.baomidou.mybatisplus.extension.service.impl.ServiceImpl;
import org.example.domain.*;
import org.example.dto.OrderDto;
import org.example.service.*;
import org.example.mapper.OrdersMapper;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpSession;
import java.math.BigDecimal;
import java.time.LocalDateTime;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.atomic.AtomicInteger;
import java.util.stream.Collectors;

/**
 * @author one more thing
 * @description 针对表【orders(订单表)】的数据库操作Service实现
 * @createDate 2023-10-08 16:32:58
 */
@Service
public class OrdersServiceImpl extends ServiceImpl<OrdersMapper, Orders>
        implements OrdersService {

    @Autowired
    HttpServletRequest request;
    @Autowired
    private ShoppingCartService shoppingCartService;
    @Autowired
    private UserService userService;
    @Autowired
    private AddressBookService addressBookService;
    @Autowired
    private OrderDetailService orderDetailService;

    //    @Transactional
    @Override
    public void submit(Orders orders) {
//        HttpSession session = request.getSession();
//        Object id = session.getAttribute("user");
//        Long userId=(Long) id;
//        LambdaQueryWrapper<ShoppingCart> shoppingCartLambdaQueryWrapper = new LambdaQueryWrapper<>();
//        shoppingCartLambdaQueryWrapper.eq(ShoppingCart::getUserId,userId);
//        List<ShoppingCart> list = shoppingCartService.list(shoppingCartLambdaQueryWrapper);
//        User user = userService.getById(userId);
//        AddressBook addressBook = addressBookService.getById(orders.getAddressBookId());
//        AtomicInteger amount = new AtomicInteger(0);
//        long l = System.currentTimeMillis();
//        orders.setUserId(userId);
//        orders.setUserName(user.getName());
//        orders.setNumber(""+l+userId);
//        orders.setOrderTime(LocalDateTime.now());
//        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
//                +(addressBook.getCityName()==null ? "" : addressBook.getCityName())
//                +(addressBook.getDistrictName()==null ? "" : addressBook.getDistrictName())+
//                (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
//        orders.setStatus(2);
//        orders.setUserName(user.getName());
//        orders.setPhone(user.getPhone());
//        orders.setCheckoutTime(LocalDateTime.now());
//        orders.setConsignee(addressBook.getConsignee());
//        orders.setAmount(new BigDecimal(amount.get()));
//        this.save(orders);
//        List<OrderDetail> orderDetails = list.stream().map((item) -> {
//            OrderDetail orderDetail = new OrderDetail();
//            orderDetail.setOrderId(orders.getId());
//            orderDetail.setNumber(item.getNumber());
//            orderDetail.setDishFlavor(item.getDishFlavor());
//            orderDetail.setDishId(item.getDishId());
//            orderDetail.setSetmealId(item.getSetmealId());
//            orderDetail.setName(item.getName());
//            orderDetail.setImage(item.getImage());
//            orderDetail.setAmount(item.getAmount());
//            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
//            return orderDetail;
//        }).collect(Collectors.toList());
//        orderDetailService.saveBatch(orderDetails);
//        shoppingCartService.remove(shoppingCartLambdaQueryWrapper);

        //获得当前用户id
        Long userId = (Long) request.getSession().getAttribute("user");

        //查询当前用户的购物车数据
        LambdaQueryWrapper<ShoppingCart> wrapper = new LambdaQueryWrapper<>();
        wrapper.eq(ShoppingCart::getUserId, userId);
        List<ShoppingCart> shoppingCarts = shoppingCartService.list(wrapper);

//        if(shoppingCarts == null || shoppingCarts.size() == 0){
//            throw new CustomException("购物车为空，不能下单");
//        }

        //查询用户数据
        User user = userService.getById(userId);

        //查询地址数据
        Long addressBookId = orders.getAddressBookId();
        AddressBook addressBook = addressBookService.getById(addressBookId);
//        if(addressBook == null){
//            throw new CustomException("用户地址信息有误，不能下单");
//        }

        long orderId = IdWorker.getId();//订单号

        AtomicInteger amount = new AtomicInteger(0);

        List<OrderDetail> orderDetails = shoppingCarts.stream().map((item) -> {
            OrderDetail orderDetail = new OrderDetail();
            orderDetail.setOrderId(orderId);
            orderDetail.setNumber(item.getNumber());
            orderDetail.setDishFlavor(item.getDishFlavor());
            orderDetail.setDishId(item.getDishId());
            orderDetail.setSetmealId(item.getSetmealId());
            orderDetail.setName(item.getName());
            orderDetail.setImage(item.getImage());
            orderDetail.setAmount(item.getAmount());
            amount.addAndGet(item.getAmount().multiply(new BigDecimal(item.getNumber())).intValue());
            return orderDetail;
        }).collect(Collectors.toList());


        orders.setId(orderId);
        orders.setOrderTime(LocalDateTime.now());
        orders.setCheckoutTime(LocalDateTime.now());
        orders.setStatus(2);
        orders.setAmount(new BigDecimal(amount.get()));//总金额
        orders.setUserId(userId);
        orders.setNumber(String.valueOf(orderId));
        orders.setUserName(user.getName());
        orders.setConsignee(addressBook.getConsignee());
        orders.setPhone(addressBook.getPhone());
        orders.setAddress((addressBook.getProvinceName() == null ? "" : addressBook.getProvinceName())
                + (addressBook.getCityName() == null ? "" : addressBook.getCityName())
                + (addressBook.getDistrictName() == null ? "" : addressBook.getDistrictName())
                + (addressBook.getDetail() == null ? "" : addressBook.getDetail()));
        //向订单表插入数据，一条数据
        this.save(orders);

        //向订单明细表插入数据，多条数据
        orderDetailService.saveBatch(orderDetails);

        //清空购物车数据
        shoppingCartService.remove(wrapper);
    }

    @Transactional
    @Override
    public Page<OrderDto> page(int page, int pageSize) {
        Page<Orders> ordersPage = new Page<>(page, pageSize);
        LambdaQueryWrapper<Orders> ordersLambdaQueryWrapper = new LambdaQueryWrapper<>();
        Page<Orders> ordersList = this.page(ordersPage, ordersLambdaQueryWrapper);
        ArrayList<OrderDto> orderDtos = new ArrayList<>();
        List<Orders> records = ordersPage.getRecords();
        for (Orders orders :
                records) {
            OrderDto orderDto = new OrderDto();
            BeanUtils.copyProperties(orders, orderDto);
            Long ordersId = orders.getId();
            LambdaQueryWrapper<OrderDetail> orderDetailLambdaQueryWrapper = new LambdaQueryWrapper<>();
            orderDetailLambdaQueryWrapper.eq(OrderDetail::getOrderId, ordersId);
            int count = orderDetailService.count(orderDetailLambdaQueryWrapper);
            orderDto.setSumNum(count);
            List<OrderDetail> orderDetailList = orderDetailService.list(orderDetailLambdaQueryWrapper);
            orderDto.setOrderDetails(orderDetailList);
            orderDtos.add(orderDto);
        }
        System.out.println("ok");
        Page<OrderDto> orderDtoPage = new Page<>();
        orderDtoPage.setRecords(orderDtos);
        return orderDtoPage;
    }
}




